Finding the Fourth Proportional to 12,775.59, 17,630.15 and 7,186.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,775.59 : 17,630.15 = 7,186.59 : x
2. Step 2: Convert to fraction form
   12,775.59/17,630.15 = 7,186.59/x
3. Step 3: Cross multiply
   12,775.59x = 17,630.15 × 7,186.59
4. Step 4: Simplify right side
   12,775.59x = 126,700,623.76
5. Step 5: Solve for x
   x = 126,700,623.76/12,775.59
6. Step 6: Final answer
   x = 9,917.40